<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
        margin: 0;
        padding: 0;
         box-sizing:border-box 
        }
        .w{width: 1200px;
        height: 400px;
    margin: 0 auto;}
        .one{width: 200px;
        float: left;    
        height: 400px;
    background-color: yellow;}
        .two{
        float: left;  
        width: 800px;
        height: 400px;
    background-color: violet;}
        .three{
        float: left;  
        width: 200px;
        height: 400px;
    background-color: springgreen;}
       
    </style>
</head>
<body>
    <div class="w">
    <div class="one"></div>
    <div class="two"> 
        <div class="b"><ul>
        <li><a href="" class="l1">我要投资</a></li>
        <li><a href="" class="l2">你投不投</a></li>
        <li><a href="" class="l3">打钱</a></li>
        <li><a href="" class="l4">没钱</a></li> 
    </div>
    </ul></div>
    <div class="three">

    </div>
</div>
</body>
</html>